<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import * as echarts from "echarts";
require("echarts/theme/macarons"); // echarts theme

export default {
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '500px'
    },
    options: {
      type: Object,
      default: () => ({})
    }
  },
  data() {
    return {
      chart: null
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart()
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons')
      this.chart.setOption({
        ...this.options
      });
    }
  },
  watch: {
    options: {
      handler(val) {
        if (!this.chart) {
          return
        }
        this.chart.setOption(val)
      },
      deep: true
    }
  }
}
</script>